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Merlin Bird ID

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    Caspian Tern Identification

    Adult Description

    • Large, gull-like tern.
    • Black cap.
    • Body white.
    • Bill large, thick, and brilliant red with dark tip.

    Immature Description

    Juvenile has blackish crown, black edging to back feathers.
    Relative Size

    Relative Sizecrow sizedcrow-sized
    • Both Sexes
      • Length: 18.5-21.3 in (47-54 cm)
      • Weight: 18.7-27.6 oz (530-782 g)
      • Wingspan: 47.2-53.1 in (120-135 cm)